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Abrasion-proof self-lubricating composite material and its preparation

A composite material and self-lubricating technology, which is applied in the field of wear-resistant and self-lubricating composite materials and their preparation, can solve the problems of undiscovered coating of solid lubricants, etc., and achieve the effect of high load, less wear and short running-in period

Inactive Publication Date: 2009-03-18
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there are very few reports at home and abroad on the use of polyphenylene, tin bronze fibers and spherical inorganic particles to modify PTFE.
Moreover, although the University of Science and Technology of China has reported in the CN1817960A patent that the wear resistance of polytetrafluoroethylene materials can be improved by electron beam or gamma ray ionizing radiation, it has not been found so far to apply solids after plasma treatment of PTFE materials. Lubricant reports

Method used

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  • Abrasion-proof self-lubricating composite material and its preparation
  • Abrasion-proof self-lubricating composite material and its preparation
  • Abrasion-proof self-lubricating composite material and its preparation

Examples

Experimental program
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Effect test

Embodiment 1

[0023] The formula of embodiment 1

[0024] raw material PTFE polyphenylene Tin Bronze Fiber glass beads Weight percent (wt%) 60 10 20 10

[0025] The wear-resistant self-lubricating composite material prepared by the above formula, its preparation method comprises the following steps in turn:

[0026] A. Polyphenylene fine powder 5-30%, tin bronze fiber 10-45%, glass microspheres, spherical SiO 2 or Al 2 o 3 Mix 2-15% of the particles and the rest of the suspended PTFE resin molding powder, put it into the mold, hold the pressure for 1-10min under 40-80MPa, and press to form;

[0027] B. Put the product into a high-temperature sintering furnace, the sintering stage rate is 50-100°C / h, keep it at 330°C for 1-1.5h, then raise the temperature to 370-385°C, and keep it for 2-3 hours;

[0028] C. Put the product into acetone, clean it with ultrasonic waves, then protect the non-working surface to expose the frictional working surface, put it into ...

Embodiment 2

[0035] The formula of embodiment 2

[0036] raw material PTFE polyphenylene Tin Bronze Fiber glass beads Weight percent (wt%) 55 10 30 5

[0037] The high wear-resistant self-lubricating composite material prepared according to the above formula, its preparation method is the same as that of Example 1.

[0038] The product of embodiment 2 and the performance contrast of pure polytetrafluoroethylene

[0039]

[0040] This material is suitable for wear-resistant, self-lubricating or dynamic sealing parts in water, such as high-pressure water pump dynamic sealing parts.

Embodiment 3

[0042] The formula of embodiment 3

[0043] raw material PTFE polyphenylene Tin Bronze Fiber Spherical SiO 2 Weight percent (wt%) 45 13 40 2

[0044] The high wear-resistant self-lubricating composite material prepared according to the above formula, its preparation method is the same as that of Example 1.

[0045] The product of embodiment 3 and the performance contrast of pure polytetrafluoroethylene

[0046]

[0047]

[0048] This material is suitable for occasions with large dust and antistatic requirements, such as transmission parts or sealing parts in coal mines.

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Abstract

The invention relates to an abrasion resistant self-lubricating composite material and a preparation method thereof. The material comprises the following raw materials in weight percentage: 5 to 30 percent of polyphenyl ester fine powder, 10 to 45 percent of tin bronze fiber, 2 to 15 percent of glass microballoons, spherical SiO2 or Al2O3 particles, and the balance being suspended PTFE resin moulding powder. The material can be applied to an oil bath dynamic seal of an engine and the manufacture of a dynamic seal of a high pressure water pump. In addition, in some working occasions with comparatively heavy dust or volatile solvents, the material can also be used as a sliding element or a dynamic sealing element with antistatic requirements, such as in a coal mine, a chemical industrial workshop. Moreover, the material is also suitable for oil forbidden high abrasion resistant self-lubricating parts at ultralow temperature and ultrahigh temperature, such as ultralow temperature refrigerating machines, liquid fuel pumps, oxygen generating devices, high temperature driers, conveyor belts inside furnaces, medicines, foods and so on.

Description

technical field [0001] The invention relates to a wear-resistant self-lubricating composite material and a preparation method thereof. Background technique [0002] In addition to its excellent high and low temperature resistance and chemical stability, polytetrafluoroethylene (PTFE) also has unique self-lubricating properties. Its friction coefficient is extremely low, which is the lowest among known plastics, even better than nylon, POM or UHMW-PE are also much lower, with very close coefficients of static and kinetic friction. Moreover, the friction coefficient of PTFE remains almost unchanged in a wide temperature range from 327°C to ultra-low temperature, and only increases significantly when the surface temperature of the product is higher than its melting point of 327°C. In addition, when high speed and high load act together, its static friction coefficient is smaller than the dynamic friction coefficient, which makes its components start and run very smoothly when ...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08K7/20B29C43/00B29C71/04C08L27/18
Inventor 宁莉萍王齐华简令奇杨生荣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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